Smartwool Sock Size Guide
Adult socks S–XXL · Kids XS–XL · By shoe size
Find your Smartwool sock size from your shoe size with Smartwool’s official charts — or ask us in our Kettering, Ohio store.
How it fits
Smartwool says its socks run true to size, based on your total foot length. Pick the size that matches your shoe size.
Adults (unisex sizing)
| Sock size | US men’s shoe | US women’s shoe | EU | UK |
|---|---|---|---|---|
| S | 3–5½ | 4–6½ | 34–37 | 2–4½ |
| M | 6–8½ | 7–9½ | 38–41 | 5–7½ |
| L | 9–11½ | 10–12½ | 42–45 | 8–10½ |
| XL | 12–14½ | 13–15½ | 46–49 | 11–13½ |
| XXL | 15–17½ | — | 50–53 | 14–16½ |
Kids
| Sock size | US shoe | EU | UK |
|---|---|---|---|
| XS | 6–8½ | 22–25 | 5–7½ |
| S | 9–11½ | 26–28 | 8–10½ |
| M | 12–2½ | 29–32 | 11–13½ |
| L | 3–6 | 33–36 | 1–4½ |
| XL | 6½–8 | 37–40 | 5–6½ |
Kids’ US 6–13½ are little-kid sizes; 1 and up are big-kid sizes. Not every style comes in every size.
Need help? We measure every customer with a Brannock device at our Kettering store. Stop in for a fitting, or call us at 937.298.1801 and we’ll help you choose. Ready to shop? Shop all Smartwool →
Source: Smartwool sock size charts (smartwool.com) · Last checked October 2026